Node quorum

Node quorum is the default quorum algorithm for GPFS.

With node quorum:
  • Quorum is defined as one plus half of the explicitly defined quorum nodes in the GPFS cluster.
  • There are no default quorum nodes; you must specify which nodes have this role.
For example, in Figure 1, there are three quorum nodes. In this configuration, GPFS remains active as long as there are two quorum nodes available.
Figure 1. GPFS configuration using node quorum
This graphic depicts a GPFS configuration utilizing traditional node quorum. There are four nodes in the configuration. Three of the nodes are quorum nodes, leaving one non-quorum node.